Explosion blew a hole in the fuselage and forced an emergency landing

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CANBERRA, Australia — Air safety investigators confirmed Friday that an exploding oxygen cylinder ripped a gaping hole in a Qantas jet's fuselage mid-flight last month, but said they were no closer to solving the mystery of why the tank failed.

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The 26-pound steel cylinder, pressurized to 1,850 pounds per square inch, "sustained a failure that allowed a sudden and complete release of the pressurized contents," Walsh said.

Most of the cylinder rocketed up through the cabin floor, shearing off an emergency exit door handle and narrowly missing a crew seat before striking the cabin roof. It ricocheted back down through the hole it created in the cabin floor, the report said.

The cylinder's remains dropped through the ruptured fuselage and disappeared into the sea.

Walsh said the cylinder had undergone a safety inspection shortly before it was installed in the jet and six weeks before it exploded.

The plane — en route from London to Melbourne, Australia — rapidly descended thousands of feet with the loss of cabin pressure and flew about 300 miles to Manila, where it made a successful emergency landing.

Questions about safetyNo one was injured, but questions were raised about the much-lauded safety of Qantas Airways, which has never lost a jet aircraft because of an accident.

In the weeks after the incident, Qantas planes experienced a number of other problems, including a loss of hydraulic fuel that led to an emergency landing, failure of landing gear, and detached panels.

"The preliminary report was a factual account of the incident and investigation to date," Qantas chief executive Geoff Dixon said in the statement. "Our own investigations agree with the ATSB's preliminary conclusions."

Qantas earlier this month temporarily pulled six planes from service because of irregularities in maintenance records. Qantas said it was a record-keeping issue and there were no safety implications for the aircraft.

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